Brickman I thought you were running cars. Now this tanker at 4.8. I am leaning towards a new Detroit. Those folks seem to know what they are doing unlike those other people at cummins and cat when it comes to fuel econ.

Kinghunter

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Been doing cars since Sept 1.

Pulled a crude tanker for 2 months prior to that. I hated it, but it was a job.

I like Detroits myself. We have ISX's and ISM's in our trucks. The fellow who order the new trucks with the ISM's was promptly fired after we got the first few. We get around 3mpg, on of our 60 Series trucks I got 6.5mpg with (Kenworth T-800's) The ISM's also are complete dogs, just don't have the power to pull hills at all. Personally I think just about anything is better then the new Cummins Engines.

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Detroits are the main reason there is more than one lane on the highway, so the rest of can pass. I would put my N-14 up against anything on the road for fuel mileage

I am currently running a 2004 c15 cat bridge motor and i have an oppertunity to trade it for a 2006 peterbilt with a 565 isx in it does any one have any info on fuel milage with these motors i am currently pulling super b trains in b.c canada with a weight of 62000 kg the bridge motor pulls alright could be better but i am burning 60 liters of fuel more than the other trucks i haul with 2003 c15 cat i am really leaning towards the 2006 pete with the isx any info would be great

I am currently running a 2004 c15 cat bridge motor and i have an oppertunity to trade it for a 2006 peterbilt with a 565 isx in it does any one have any info on fuel milage with these motors i am currently pulling super b trains in b.c canada with a weight of 62000 kg the bridge motor pulls alright could be better but i am burning 60 liters of fuel more than the other trucks i haul with 2003 c15 cat i am really leaning towards the 2006 pete with the isx any info would be great

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Just make sure its geared right. If its geared to run on logging roads you may not get the best fuel economy on the hwy without changing gears. Get the parameters set-up for you with Powerspec, its a free dowload from powerspec.cummins.com. You have to buy an inline adaptor or have your dealer do it for you. Take a thumb drive with you and have them create a template for you to save on the thumb drive. Good luck and set some money aside for an EGR valve or EGR pressure tubes every 150k to 200K miles. You can clean the tubes yourself every 100K miles as maintenance if you want but at least put the insulated models on their not already on there. Oh yeah, test the radiator cap, it needs to hold 14psi. If it doesn't you'll be buying an egr cooler too.

The truck in my profile pics that I wrecked had a 525 Cummins in it. Fresh overhaul. (less than 200,000 miles on it)

The replacement truck had a 500 CAT with over 800,000 miles on it. Trans, rear ends, tires etc specs were all the same.
Same brand, same model, one was a 99 other was 00.

The CAT would get up and leave the cummins powered truck far behind pulling the same load.

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I've driven both and have to agree. My 475hp bridge motor (universally condemned as the worst Cat engine ever) even when it was all stock still had better power than any ISX I ever had. Hell it would outpull lots of loaded trucks out there with a bad turbo on it that looked like it had been blowtorched on the inside. No it doesn't pull down to 1200 rpms like a Cummins, anything below 1400 is lugging and I'm splitting a gears, but who cares how low you can lug if the motor doesnt pull as well?